package cn.edu.ctbu.dp01.api;

import cn.edu.ctbu.dp01.constant.REnum;
import cn.edu.ctbu.dp01.entity.Student;
import cn.edu.ctbu.dp01.exception.RException;
import cn.edu.ctbu.dp01.service.StudentService;
import cn.edu.ctbu.dp01.util.RUtil;
import cn.edu.ctbu.dp01.vo.QueryObj;
import cn.edu.ctbu.dp01.vo.R;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.*;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/api/student")
public class StudentApiController {
    @Autowired
    private StudentService studentService;

    @GetMapping("/list")
    public R<List<Student>> findAll(){
        List<Student> students = studentService.getAll();
        return RUtil.success(students);
    }

    @GetMapping("/search")
    public R<List<Student>>findByName(@RequestParam (value = "name",required = true) String name) throws Exception {
        List<Student> student = studentService.findByName(name);
        return RUtil.success(student);
    }

    @GetMapping("/{id}")
    public R<Student> findById(@PathVariable int id) {
        Student student = studentService.findById(id);
        return RUtil.success(student);
    }

    @PostMapping("/add")
    public R<Student> add(Student student) {
        return RUtil.success(studentService.add(student));
    }

    @PutMapping("/update")
    public R<Student> update(Student student) {
        return RUtil.success(studentService.update(student));
    }

//    @DeleteMapping("/delete/{id}")
//    public R delete(@PathVariable Integer id) {
//      studentService.delete(id);
//      return RUtil.success();
//    }

    @DeleteMapping("/delete/{str}")
    public R delete(@PathVariable String str) {
        String[] arr = str.split(",");
        for (String s : arr) {
            studentService.delete(Integer.parseInt(s));
        }
        return RUtil.success();
    }

    @GetMapping("/validateUser")
    public R validateSnoAndPassword(String sno,String password) throws Exception {
        return RUtil.success(studentService.validateUserSnoAndPassword(sno,password));
    }

    @PostMapping("/getbypage")
    public R<Page<Student>> getbypage(@RequestBody QueryObj<Student> qObj) {
        //按id排倒序
        Sort sort = Sort.by(Sort.Direction.DESC, "id");
        Integer pageIndex = 0;
        Integer pageSize = 10;
        if(qObj == null){
            //对象student为空就直接调用分页
            Pageable pageable = PageRequest.of(pageIndex,pageSize,sort);
            Page<Student> students = studentService.getAll(pageable);
            return RUtil.success(students.getContent(), students.getTotalElements());
        }else {
            pageIndex = qObj.getPage() - 1;
            pageSize = qObj.getLimit();
            if(qObj.getData() instanceof Student){
                Student student = (Student) qObj.getData();
                Pageable pageable = PageRequest.of(pageIndex,pageSize,sort);
                ExampleMatcher matcher = ExampleMatcher.matching()
                        .withMatcher("name" , ExampleMatcher.GenericPropertyMatchers.contains())
                        .withIgnoreNullValues();

                Example<Student> example = Example.of(student, matcher);
                Page<Student> studentPage = studentService.getAll(example,pageable);
                return RUtil.success(studentPage.getContent(), studentPage.getTotalElements());
            }else {
                throw new RException(REnum.QUERY_ERR);
            }
        }
    }
}
